"Weird" problem with flashdrives

R

Rixter69

Afternoon All:

This will be a fairly long thread for I need to include a lot of info. Hope you'll indulge me.
About a week ago, I noticed that a flashdrive suddenly started 'writing" at less than half the speed it previously had.Went to "net" and a few forums and after many attempts at restoring the drive, all failed and it was concluded the drive was dying. I was willing to accept that until yesterday when 2 more of my drives started doing the same. Ahmm..this isn't a coincidence. Something is causing these drives failure... well, they really aren't failing, but are corrupted as opposed to their original abilities. I have run a series of 'corrective" measures on the first drive that started acting up. I've only run virus/malware scans on all 3 drives and all came up negative. If you'd like to know what I've done in regards to "repairing" the first drive, then please request it for it's an extensive list. So, here's what I'm hoping to accomplish; #1. Identify and correct whatever is causing these drives slow writing speed. #2. Restore these drives to their original specs. You need to know that these drives aren't old by any standards. Have never had any problems with these drives until they suddenly started writing at an exceeding slow speed. OK, I'll tender the specs:
[Kingston DT101 16Gb 2.0~original 7.4+Mb/s] [Sandisk Cruzer 8Gb 3.0 ~ original 14.6+Mb/s] [Sandisk Cruzer Glide 3.0 256Gb~ original 16.8-21+Mb/s] (( Dell optiplex 9020; Intel i5)) ((Windows 7 enterprise))
The drives in question do not write any faster than 3.6Mb/s at best and the Kingston @ 1.8-2.1Mb/s. If there's info that you need and I haven't provided, please request. And lastly, please DON"T insult my intelligence by saying "they are all dying/dead; just throw them away and get new ones". If that is your attitude, don't bother responding!!!
Thanx:
Rick
 

VirtualLarry

No Lifer
Aug 25, 2001
56,552
10,171
126
If you've block-erased (VConsole USB Flash drive tester, or Rufus), and then re-partitioned and re-formatted, the sector alignment and block-size might be "off" as compared to "factory" specs, and those things can affect write speeds quite substantially.
 
R

Rixter69

RE: VirtualLarry:

Forgive my ignorance; "block-erased"? "VConsole USB Flash Drive tester, or Rufus" No, No and No. I did use a program called USBDevView which I used to test the "speed" and those 'speeds" were what I posted. I also used (Win7) comp>right-click device>properties>tools>error checking which reported all devices working properly. And of course the maleware/virus detection I mentioned in the thread. Do you want to know all I've done in regards to trying to restore the drives? Warning: it's an extensive list!

Another Day; Another Dollar...in debt
Rick
 

VirtualLarry

No Lifer
Aug 25, 2001
56,552
10,171
126
You do realize, that flash drives don't support TRIM, so once you write to a drive completely, then it has to garbage-collect every time that you write to it more. Thus, they slow down from their "fresh" speeds.
 
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